//
//  TLButtonViewController.swift
//  TLiOS26LiquidGlassDemo
//
//  Created by jiayin on 2025/8/18.
//

import UIKit

/**
 * 一、介绍
 * 在 iOS 26 中，UIButton 迎来了两项非常实用的更新：
 *  1. Liquid Glass 风格配置方法 — 让按钮拥有全新的半透明折射质感，完美融入 iOS 26 的视觉系统。
 *  2.Symbol 动画切换 — 通过 symbolContentTransition 实现更顺滑的 SF Symbols 切换效果。
 *
 * 二、适配Liquid Glass
 *  UIButton.Configuration 增加了符合 Liquid Glass 风格的配置方法：glass()、clearGlass()、prominentGlass()与prominentClearGlass()。
 *
 * 三、symbolContentTransition
 *  UIButton.Configuration 增加了类型UISymbolContentTransition?的属性symbolContentTransition，用于切换 SF Symbols 图标，并且可以呈现切换动画。
 */
class TLButtonViewController: UIViewController {
    let configs: [UIButton.Configuration] = {
        [
            {
                // iOS26新增
                var config = UIButton.Configuration.glass()
                config.title = "喜欢"
                config.image = UIImage(systemName: "heart")
                return config
            }(),
            {
                // iOS26新增
                var config = UIButton.Configuration.clearGlass()
                config.title = "收藏"
                config.image = UIImage(systemName: "star")
                return config
            }(),
            {
                // iOS26新增
                var config = UIButton.Configuration.prominentGlass()
                config.title = "分享"
                config.image = UIImage(systemName: "square.and.arrow.up")
                return config
            }(),
            {
                // iOS26新增
                var config = UIButton.Configuration.prominentClearGlass()
                config.title = "下载"
                config.image = UIImage(systemName: "arrow.down.circle")
                return config
            }()
        ]
    }()
    
    let button = UIButton(frame: CGRect(x: 100, y: 200, width: 200, height: 200))

    override func viewDidLoad() {
        super.viewDidLoad()

        view.backgroundColor = .systemGray

        for (index, config) in configs.enumerated() {
            let button = UIButton(frame: CGRect(x: 120, y: 420 + CGFloat(index) * 70, width: 160, height: 60))
            button.configuration = config
            if (config.title == nil) {
                button.isSymbolAnimationEnabled = true
                button.tintColor = .systemRed
            }
            view.addSubview(button)
        }
        
        // UIButton.Configuration
        var configButton = UIButton.Configuration.plain()
        configButton.image = UIImage(systemName: "heart.circle")
        configButton.preferredSymbolConfigurationForImage = UIImage.SymbolConfiguration(pointSize: 50, weight: .thin)
        // iOS26新增
        configButton.symbolContentTransition = UISymbolContentTransition(.replace, options: .speed(0.1))
        button.configuration = configButton
        button.isSymbolAnimationEnabled = true
        button.tintColor = .systemRed
        view.addSubview(button)
    }
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        button.configuration?.image = UIImage(systemName: "heart.circle.fill")
    }
}
